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A is thrice as productive as C. Together they can complete a job in 22.5 days. If B joins them after they have worked for 15 days then in how many days canthey finish the rest of the job if B alone can do the job in 15 days?

A is thrice as productive as C. Together they can complete a job in 22.5 days. If B joins them after they have worked for 15 days then in how many days canthey finish the rest of the job if B alone can do the job in 15 days? Correct Answer 3

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